Oxygen: a four billion year history

What is it about planet Earth?

Life before oxygen

Evolution of oxygenic photosynthesis

Cyanobacteria: the great liberators

What controls atmospheric oxygen concentrations?

The early history of atmospheric oxygen: biological evidence

The early history of atmospheric oxygen: geological evidence

The great oxidation

Earth's Middle Ages: what came after the GOE

Neoproterozoic oxygen and the rise of animals

Phanerozoic oxygen

Epilogue